Attachment for drill presses



June 1, 1937. .c. TURNEPSEED 2,082,310

ATTACHMENT FOR DRILL PRESSES Original Filed Ju1 '25, 1934 1 I0 I v r H I1 F i 5: a. O 53 awe WM 5a CLARENCE TURNEPSEED,

Patented June 1, 1937 UNlTED STATES FFEQE ATTACHMENT FOR DRILL PRESSESClarence Turnepseed, Springfield, Ohio, assignor of one-fourth to FrankG. Campbell, Arlington County, Va.

4 Claims.

This invention relates to an attachment for drill presses of theconventional vertical type comprising a vertically disposed drillspindle and a substantitally horizontally disposed table. Drill pressesof this character are very common and are familiar to all mechanics. Thepresent application is a division of my co -pending application, SerialNo. 736,922, filed July 25, 1934. The application aforesaid discloses atool carrying slide supported from the table of a drill press andadapted to move turning and cutting-01f tools into engagement with stockrotated by the movement of the drill spindle in such manner thatpintles, arbors, and many other small shapes may be readily turned outwithout the necessity of employing a lathe.

The present invention contemplates the mounting of a tool in the natureof a circular saw in such manner as to rotate the same from the drillpress spindle and the supporting of the same in such manner as to resistthe lateral thrust of a piece of stock to be acted upon by said saw. Themanner in which this is done, and some of the adaptations of thisstructure will be specifically pointed out in the detailed descriptionwhich follows.

In the accompanying drawing,

Fig. 1 is a view partly in side elevation and partly in section showingthe saw attachment applied to a conventional vertical type drill press.

Fig. 2 is a modification illustrating two saws adapted to reduce orflatten the end of a piece of round stock.

Fig. 3 is a detailed View of a piece of stock showing how the same maybe slotted by the saw of Fig. 1.

. Fig. 4 is a detail view of the work supporting block of Fig. 1.

Fig. 5 is a detail side view of a modified form of work holder, and

Figs. 6 and 7 illustrate shapes which may be made by the structure ofFig. 5.

Like numerals designate corresponding parts in all of the figures of thedrawing. The elements 5 and 6 of Fig. 1 correspond to the like elementsof the parent application above identified. That is to say, 5 designatesthe drill table and 6 the usual rotative spindle of a conventional typeof drill press. I may clamp shaft I, carrying a circular saw 8, directlyin the drill spindle 6 for the purpose of rotating the same or I mayclamp a chuck 9 in the spindle 6 by means of the screw 10, and have theshaft 1 engaged by the chuck, it being clear that it makes no differencejust how the shaft 1 is engaged as long as it is rotated by the drillspindle 6.

In my parent application aforesaid, I have disclosed a tool carryingturret that is mounted to slide toward and from the axis of the shaft 1and I employ such a structure in the present case, the same beingillustrated in Fig. 1 where 50 designates the tool carrying turret. Aring 5! is clamped about the top of the turret by screw 52. This ringcarries a block 53, the open face of which is V-shaped, or in the formof a concave recess. If the work to be done consists of slotting theheads of screws, for example, said screws are placed in the V-shapedrecess of block 53, and a binding screw 54 is turned down to hold thescrew firmly against movement.

This binding screw 54 passes through a yoke 55, the legs of which areengaged with slots 56 formed in the sides of the block. Thus, when thescrew that is being acted upon, indicated at S, is to be removed, thebinding screw 54 is released and the yoke is moved rearwardly and swungdown to the dotted-line position of Fig. 1. Then the screw S may belifted out of its seat and another substituted therefor, ready for theoperation of slotting.

However, this device is by no means limited in its usefulness to theoperation of slotting screws. If, for example, small pieces of stock beclamped in the block, the ends thereof may be reduced and flattened asindicated at 51 in Fig. 2, or may be slotted as indicated at 58 in Fig.3 by the employment of two saws, as indicated at 59 and 6!) in Fig. 2,or a single saw as indicated at 6| in Fig. 3. It is frequently desiredto shape the end of small pieces of stock in the manner shown in Figs. 2and 3, for the purpose of making articulated joints, the reduced andflattened end 51 of Fig. 2 entering the recess 58 of Fig. 3 and thewhole being traversed by a hinge pin, not shown.

Most vertical type drill presses are constructed in such manner that thespindle 6 may be raised and lowered during the drilling operation, forthe purpose of forcing the drill into the work. This capability ofvertical movement of the drill spindle may be utilized to traverse thesaw 8 bodily, vertically, during its cutting operation so that it mayquickly rough off or reduce a piece of stock over a considerable length.

In Fig. 4, the ring so, corresponding to the ring 51 of Fig. 1, supportsthe overhanging lugs 53a, said lugs carrying set screws adapted to clampa piece of stock in said lugs. In said Fig. 4 a piece of stock a hasbeen reduced at b by simultaneously rotating the saw from the drillspindle and moving the saw bodily vertically. The extent of thereduction of the part b is of course determined by the degree ofmovement of the turret 50 toward the saw, and it is clear that by movingthe turret carrying slide toward the saw during the vertical movement ofthe saw, the part b could be tapered as in Fig. 5. By moving the turrettoward the saw during onehalf of the vertical movement of the saw, andaway from the saw during the other half of its vertical movement, thepart b could be made concave, as in Fig. 6. There is almost no end tothe multiplicity of shapes and small parts which may be turned outrapidly and accurately with this attachment.

I am aware of the fact that various grinding machines are on the marketby means of which the grinding off and shaping of metal parts may beeifected. However, these machines are specially made and are quiteexpensive. What I aim to do by the present invention is to provide anattachment adapted to take advantage of the existing capabilities ofknown drill presses so that the small work shop owner may, by the use ofthis attachment, turn out a multiplicity of small shapes, the creationof which would ordinarily require the purchase of a lathe. Thesecapabilities are inherent, in part, in the structure of the presentapplication and they are also inherent in the structure of my parentapplication aforesaid.

The block 23 corresponds to the block 23 of my parent applicationaforesaid, and is intended to be secured by the feet 23a, or otherwise,to the table 5. A guide 51 corresponds to the like element in the parentapplication and serves to hold the lower end of the shaft 7 against the,lateral thrust that is brought thereon when the stock to be acted uponis moved into engagement with the saw. The slide 45 which carries theturret and the actuating means for the same are the same as in my parentapplication, above identified.

It is to be understood that the invention is not limited to the precisearrangements shown and described, because it is manifest that many wayswill readily suggest themselves to the skilled mechanic of mountingstock to produce shapes of various kinds. Therefore, it is to beunderstood that the invention includes within its purview whateverchanges fairly come within either the terms or the spirit of theappended claims.

Having described my invention, what I claim is:

1. The combination with the conventional vertical type drill presscomprising its rotative spindle and supporting table, of a shaft andmeans for engaging the shaft with the spindle in such manner as to drivethe shaft from the spindle, a tool carried by the shaft having aperipheral cutting edge, a slide supported upon the drill table, andmeans carried by the slide for firmly gripping and holding stock to beworked upon, the said slide being provided with means for advancing ittoward the said tool.

2. A structure as recited in claim 1 in combination with settable stopscarried by said slide to determine the degree of movement of the slidetoward the tool.

3. The combination with the conventional vertical type drill presscomprising its rotative spindle, tool engaging clutch carried by saidspindle and supporting work table, of a shaft adapted to be engaged bysaid clutch in such manner that rotation may be imparted to said shaftfrom said clutch, a guide supported from the work table with which thelower end of said shaft engages and by which said shaft is held againstwabbling while having both endwise and rotative movement in said guide,a slide supported upon the drill table and movable toward and from theaxis of said shaft, means carried by said slide for gripping and holdingwork to be advanced toward said shaft, and a tool carried by said shaftand having a peripheral cutting edge for engagement with the workcarried by said slide.

4. The combination with a vertical type drill press comprising arotative spindle and table, of a block, means for mounting said blockupon the table of the drill press, a guide carried by said block, ashaft, the lower end of which is adapted to be guided by said guide,said shaft being actuated from the drill spindle, a tool having aperipheral cutting edge carried by said shaft, a slide carried by theblock, and a stock gripping means carried by the slide.

CLARENCE TURNEPSEED.

